Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Reduced-Size Bandpass Filter Using Symmetrical Coplanar Structure

  • Namsang, Apirada (Department of Electrical Engineering, Faculty of Engineering, Rajamangala Institute of Technology) ;
  • Akkaraekthalin, Prayoot (Department of Electrical Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology North Bangkok) ;
  • Vivek, Vech (Department of Electrical Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology North Bangkok)
  • Published : 2002.07.01
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Abstract

This paper proposes a new symmetrical bandpass filter based on capacitive loading with a coplanar waveguide (CPW) structure. The filter was numerically designed at the operating frequency around 2 ㎓ by using IE3D software package. The characteristics of the proposed filter were then measured which the results were in good agreement with simulation. The passband insertion loss was considerably low (~3 ㏈) and the return loss was high (greater than 10 ㏈). The size of the proposed filter was also decreased approximately 50% when comparing with the fitters using conventional transmission lines.

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